Governor for tractor engines



s 927 0.1'. NlcHoL GOVERNOR FOR TRACTOR ENGINES Filed Jan. 5, 1927 2 Sheets-Sheet 1 Om?, T. NIcHoL @wom-t0@ g o. T. NlcHol.

GOVERNOR FOR TRACTOR ENGINES Filed Jan. 5, 1927 2 ShaetshSheet 2 Al W f fr Omay T. NlcHoL. 3mm O (kunnen,

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oRR T. NICHCL, E

PATENT oFFicE.

OMAHA, NEBRASKA, AssIGNoR or CNE-'HALE To ALBERT H.

BECKER, 0E COUNCIL EIiUrEs, IOWA.

GOVERNOR yECR TRACTOR ENGINES.

Application ined 'January 3, 1927,', serial Nb. 158,599.

My invention relates to governors for in ternal combustion engines, andr particularly to governing mechanism attachable to such engines as accessory equipmenttherefor. It. is the object'of my Invention to provide a.

ygovernor' mechanism especially adapted for use upon the well-known Fordsonr tractor, which may be readily attached thereto with yout requiring alteration kof any of the standard parts of the tractor engine, and which will provide yan ellicient, durable and economical means for automatically controlling the speed ofthe engine.

Ay structure embodying my invention is illustrated in the accompanying drawings, in which'Fig. 1 is a vertical section through lthe front cover extension of thetractor engine, showing the `-governor mechanism yin front elevation, the section'being on the line 1 1 of Fig. 2, Fig. 2 fis a side view of the yfront portion ofthe engine, showing the governor mechanism inplac-e thereon,*Fig.`3 is ya detail section through the governor on the line 3 3 of Fig. 1, Fig. 4 is a partial front view and partial section on the liner 4 4 of Fig. 3, Fig, 5 is a detail section on the line 5 5 Lof 4, and Fig,y 6"is y'a ksection on the line 6 6 of Fig. 5.`

.ln many instances, and particularly when Clevic'esare to Vbe'driven whichfrequire a substantially "constant speed underr varying loi/ids, it is highly desirable to apply automatic speed-governing mechanism tothe `motor, "or engine, of` a For'dson tractor, but

- the application of .suchgo'vernor mechanism epresents peculiar 'diiculties'because' of the trelative inaccessibility of parts,to which the rgovernor"maybe connected kfor `driving the saine, and also because ofthe limited'space ka'va'ilablein which the governor may be disposed without 'interfering with the standard 2parts y"of yther motor and its' adjuncts. In

carrying out my invention Iprovide a goveriior'me'chanism for whichfthe driving con-` nec'tio'n is 'formed' at the front end of the kiiiotor, "carin-slurf@ andy accommodate' such drivingmechanism by a slight re-arrange-y 'ment "of ythe commutatorjfof the 'ignition limechanism, Lwhich is normally f connected vwith saidf'portion'of the cam-shaft.

` ln' 'tlienormal construction andarrangenientof the yFordson motor the cam-shaft 10 proj'ec'ts through openingL 11 'in the front cover of "the'cylinder-block 13, the'end of 'Saiflshathavng 'a rthree..ded portion la as hereinafter explained.

i i which isy disposed a nut for retaining upon the shaft a collar Which carries the commutatorbrush, and therey being in the camshaft adjacent to said threadedportion la a transverse pin 16 of which 'they protrading end is engaged with the brush-collar to prevent rotation of said collar relative to the shaft. .ln the face of the front cover'12, concentric with the cam -shaft 10, is ashallow cylindrical recess or seat 17 y'for receiving the open end of the commutator-case 18, the latter beingheld rotatively in said seat by means of al flat retaining-spring 19, the end yof said springresting in a depression in the yFront end of the case, and thespring ybeing held by one of the front-coverbolts 20. A trough-,likeextension 21 is formed integrally 'withaud projects forwardly.from the lower portion of the front cover 12, said extension :having` on the bottom thereof lugs 22 for connection with the front axle of the tractor, and the radiator 23 being supported upon the upper front portion of said extension.

The fan-drive pulley 24is mounted upon the f 'front end of the crank-shaft 25 within the so *lower portion of the trough-member 21, and

from said pulley the fan-'belt 26 extends up i to the fan-pulley 27, the fan 28 being dis- [posed between said pulley and the rear side of the radiator 28, and the fan-shaft being carried upon aV bracket 29 extendingy down from the radiator-top-tanlI-connection 309` The parts hereinbefore designated by reference numerals are shown inr Figs. 1, 2 and 3. and constitute the structural environmentof my governor mechanism, 4all of said parts having the Ausual or standard structure and arrangement, except thek commutator devices',

, 'In applying my governormechanism, the

commutato'r-case 18 is removed from the seat 17, the commutatorlbrush is removed from the f cam-shaft, andthe collar, usually employed for cdnnecting the brush withthe cam-shaft, y

kthat anopening 33 in the casing `is alined with ythe opening 11 aboutthe cam-*shaft 10,

as shown in Fig. 3. At the'upperipart of the "governor-Casing v31 is a lugBfl havin@ y,an

opi-ini" u which registers witln one A'of the hole the front-coverfbolts. Ferthis hole a belt is provided which. slonger than the ordinary bolt, and said special bolttherewith the cylindrical lhousing 3S which extends forwardly therefrom between the pulleys 24 and 27, so as to be straddled by ythe fan-belt 26 as shown in Fig. l. Theffront end of the housing 3S has a coverplate 39 removably secured thereon by screws 40. lVithinthe casing 3l is agear 4lwhich is disposed concentricallywith the camshaft l0, the hub of said gear fitting slidably upon the cani-shaft, and the bore of the hub having a keyway 42 therein, into which the end of the pin lil-extends to form a driving con nection between the shaft and gear. The nut l5 on the threaded end of the cam-shaft holds the gear in place longitudinally. and the rearwardly extending portion of the gear-hub fits into the, opening 33`in the rear side of the casing. rl"he front side of the gear 4l is vcupped or annulai'ly recessed, and the front plate 36 of the casingrhas a cupror cylindrical inwardly extending portion 43 which fits within the cupped face of the gear as best shown in Fig. 3. The cup, or vportion 43 of the casing. has an opening therein concentric with the cam-shaft, and adjacenttothe edges of said opening is formed a seat 44, similar to the seat l7,`for receiving the rear end of the coininutator-case 18. The latter,r being placed in said seat 44, is retained therein by the spring 19 in the saine mannery as when disposed in the seat 17, and is, in substantially its usual relation to the cam-shaft, being merely shifted forwardly or'longitudinally of the camshaft a distance equal to that .between the seats i7 'and 44. The coininutatoi'fbrush-asseinhly, comprising the roller 45, lever 45 and spring 47, `is mounted upon the fronthub of the gearA 4l as best Vshown in Fig. 4, so that the brush is in proper operative relation to the commu-r tator when the case 13 is engaged in the seat 44. i y

A gear 43 is disposed in the casing 3l, said gear being positioned concentrically with the housing 38, and meshing with the gear v4l so as to be driven thereby. A shaft 49 is fiXedly connected oi' integrally united with said gear 48, andr extends therefrom forwardly through thehousing 38, the front end of said shaft being shonldered to receive the inner race of a ball bearing 5l, and the outer race 52 of said bearing being seated Vin a recess in the cover-plate 39 of the housing. The rear side of the gear 48 is recessed toreceive a ball bearing 53 of which the outer race 54 is pressed into theirecess of the gear, and the inner race 55 is supported upon a fixed post 56 which extends forwardly from the backplate of the casing 3l. On the front side of the gear is a. pair of lugs 57 which are diainetrically opposite, and upon which are pivoted the fly-weights 53, each of said weights having at the rear end thereof a pair of lugs whichA straddle the respective lug 57 to receive thepivot-pin 59. From one of the pivot-lugs on each weight an arin 6l) is extended inwardly alongside the shaft 49, as best shown in Fig.V 6. rlhe inner or adjacent sides of the weights 58 are concaved to fit about a spool-shaped collar 6l which is mounted slidahly upon the shaft 49, the rear end of said collar adjoining the arms (it), soy

that when the weights move outwardly said arms 60 push the collar forwardly as shown in F ig. 5. LA, ball thrust-bearing 62 is disposedaboutthe shaft adjoining thefront end of the collar 6l, and in frontof said bearing is the disc fn the npper part of Athe housing38 is pivotally supported a transverse roclringshaft 64 to which is secured an arm G5 having' a forked lower portion which extends down in front of the disc` 63, straddling the shaft 49, the rocking-shaft projects laterally from the housing and has a U-bend (5G formed therein, the outer leg of the l-hend being returned to the normal axis, and the shaft their continued to a crank-arm 67 which extends upwardly and rearwardly fromr the shaft-anis. A rod 63 is connected with the upper end of the ci'anlr-arni 37 by means of a ball-joint 69, and said rod 63 is extended to and connected with the engiiie-tlirottle in any suitable manner, such that the throttleopening will be increased and decreased by movement of the rod S3 forwardly and rearwardly, respectively.

The operation of .the described governor mechanism will be readily apparent. The gear 41, being larger than i the gear 48, will drive the latter at a lhigher speed than that of the cam-shaft l0 on which the drive-gear is mounted. The weights 53, mounted di rectly on the gear'43, are thrown outwardly by the centrifugal force resulting from their rotation with the gear, the motion of the weights is communicated. through the arms 60, collar 6l,.thrustbearing and disc 63, to the forked arm of the rocking-shaft, and the latter is thereby actuated to operate the engine-throttle. f

It-will be noted that the mechanism consists offew and simple parts, and may be inexpensively produced by reason of such simplicityof structure.l The disposal of the rear bearing for the shaft 49 within the recessed rear side of the gear 48 enables said gearl and the gear 4l to be placed directly VVagainst the rear plate of the casing,

Vso that the over-all thickness of the casing may be merely the thicknessof the gears plus that of the back-plate and cover of the casinfav The flat formation oft-lie casing as shown. A portion of enables the same to bey disposed against the said commutator-brush, and means for securfroiit-cover of the engine, inthe limited space behind the fan-belt and fan-pulleys,

while the projecting housing 38, kinclosing y the fly-weights, may extend into the space between the straight portions of the fanbelt intermediate the fan-pulleys 24 and 27. The compact arrangementattained by the cupping of the drive-gear il and ofthe front-plate of the casing, enables the placing of the commutator mechanism so nearly in the usual position thereof as to require no extension of the cam-shaft, oralteration of the retaining spring 19 oi' of the coinin'utator control-rod, while allowing a thickness at the toothed rimsfof the gears sufficient to afford ample strength and wearing capacity there- `of. The U-beiid 66 of the rocking-shaft allows the saine to pass around the fan-belt,

so as not to interfere therewith, while allowing the necessary rocking movements of they shaft. The opening 33 of the governorcasing` being in register with the opening 1l through the front-cover, and said opening ll communicating with the interior of thev crank-case, a sutlicient quantity 'of oil is received through said openings, byjplashing from the crank-case, to eiiiciently liibricate the governor mechanism without the yprovision of other means of rlubrication therefor, i i

Now, having described my invention, what I claim and desire to secure by Letters Patent is: V v

l. In a governor mechanism for Fordson tractor engines, a cupped gear adapted to lit vupon the engine cani-shaftin rthe normal location of the cornmutator-lorush-asseinbly,V

a commutator-brush mounted upon said gear at the rcupped front side thereof, a governorcasing inclosing said gear and having a cupped front/portion exteuding'into the clipped side of the gear, said portion of thev casing having any opening therein through which the gear-hub and commutator-brush extend, there being formed in the casing about said opening a seaty for retaining a commutator-casein operative relation with which the means for securing the governorcasing upon the front-cover comprise a boss formedr on the rear side of said casingand extending into the commutator-case-seat of the front-cover, a lug on the casinghaving f 'y an opening registering with one of the front-cover bolt-holes, and a front-cover-bolt extending through said lug. n f

4. In a governor mechanism for Fordson tractor engines, a relatively thin flat casing disposed against the front-cover of thefenvgine behind the fan-belt thereof, a housing member on 'the front of said casing and extending into the space ybetween the vertical portions of the fan-belt, a longitudinal shaft jourfnaled in said housing member, a

gear secured to the rear end of said shaft# and extending peripherally into the flat casing, fly-weights connected with said gear rand extending about said shaft within said .housing member, the rear side of said gear f being centrally recessed, bearing means disposed in said `recess and supported upon the rear portion of the flat casing, and a drivegear disposed within the flat casing rand rmeshing kwith said irst-namedgear, said drive-gear ybeing secured upon the portion of the engine cam-shaftr which projects through the front-cover. y f' 5. A structure as set forth in claim 4, including a.k transverse rocking-shaft actuatable by the fly-weights and extending laterally from the housing member, said rockingshaft havinga U-bend straddling the adjacent portion of the fan-belt, and a crankarm formed atfthe extremity of said shaft outside the U-bend. f

yoiiie T. NioHoL. 

